I have a 2011 Explorer XLT. Has sync and the touch screen. None of the stereo or climate control buttons either on the touch screen or on the dash panel work unless I disconnect the battery for a few seconds. Then everything work fine for that key cycle. once you shut the vehicle off its right back to square one. Also, while this issue is occurring it blows heat out of the defrost with no ability to change it until you disconnect the battery. any help or advice is much appreciated.